What should replace the question mark below?
?, ranu, atur, upite, ar, art, enu, ercur
Scroll down for a clue and further down for the answer.
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Clue: The first and last letter of each word have been removed.
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Answer: eptun.
The sequence consists of the planets in the Solar System with their first and last letters removed. The planets are in reverse order in terms of distance from the Sun. The missing planet is Neptune, hence the answer is ‘eptun’.